| ⇢ | A | ErrorHandler added | |
| ⇢ | A | ErrorProvider added |
| ⇢ | A | ErrorHandler::handleError() added | |
| ⇢ | A | GraphQLException::getExtensions() added | |
| ⇢ | A | GraphQLException::setExtensions() added | |
| ⇢ | A | Executor::handleError() added | |
| ⇢ | A | Executor::getErrorHandler() added | |
| ⇢ | A | ErrorProvider::register() added |